Fkiedrich von holt



imrrED -;gTA- 1:s PATENT krrron FRIEDRICH vo nonr or ssoaesivraiiir anfir'rs, NEAR 'osNaBRttcK, GERMANY.

PROCESS or rnonoomoau molt ALLoY 'mcn.m. ,.rrr osrrroaus rnoitmrs'aroa rmnarspso. 1

No Drawing.

- Z '0 all whom it may cone-cm marienhiitte, near Osnabriick, in the Ger-- man Empire, have invented certain new and useful Improvements in Processes of Producing an Iron Alloy Rich in Phosphorus from Inferior Finery Slag, of which the following is aspecification.

My present invention relates to the obtainment of'a comparatively valuable commercial product from a matter or an article for-which hitherto no sulliciently profitable utilization has been discovered.

My invention relates in particular to a novel Way of utilizing the slag formed in the refining furnace, for instance, in a finery hearth, or a converter.and-which has hitherto been considered almost raluelcss. When a part of such'fslag, on account of. its iron or manganese contents, is resmelted in the blast furnace, its phosphorus contents are sure to result .in an impure blast, furnace product, especially so'when quality grades of pig iron agood quantity are sought. A utilization of the phosphorus ofthe ope'n hearth slag has hitherto ,been feasible only if the amount of phosphorus therein was high enough to conform to the prescriptions for powdered phosphate.

It is the object of my present invention to provide a process according to which a valuable commercial .product may be cheaply obtained from: such a medium slag'whieh may contain from one to-six per cent. of

. phosphorus hitherto considered almost valueless.

' My processconsists in producing-by means of this slag an iron 'a'lloy "rich in phosphorus by adding the =phosphatic slag to the charge of an eizisting gas generator in whichcoal is subjected to oxidation. until an ash is left,

as is customary In the-generator the heat causes the basic constituents of the said phosphatic slagto combine with the silicates of the ash constituents of the coal, while the phosphorus forms with the iron thedesired term-phosphorus. The operation of the generator is not unfavorably influenced by this Specificalmn i ers-ram: Patented'Aug. 29, 1916.

Application filed June 26, i I i I I 191th saga 105,935.

'process. 'ivhieh carried out as a by=nianufacture furnish-mg a readily-salableproduct.

If the slag is manganiferou'sas will fre- V quently be the case, the resultingproduct of the novel process wilibe a specular iron rich in phosphorus 'which can be .used in the smelting of steel in substitution of the usual additions, whereby the steel is simultaneously imparted the required amount of manganesc and phosphorus. V

It has been proposed toproduce liquid iron in the gas generator. .However, it is the object of my present-inventionto provide a process forthe manufacture "of a cone niercial article from an inferior slag con taining amedium amount of phosphorus.

to secure by Letters Pa tent o'f the -United States, is

containing phosphorus fromaslag', contain charge of coal ina gas generator, tbeteuh pe'rature being sufliciently high tocause the the silicates of theash ofthe coal.

basic constituents of the slag to 'combinewith 2. A process of producing iron-alloy from j a slag containingphosphor'us, which sists in mixingv the said slag togeth coal, a-ndsub ecting the coal to 'theftemperature being sufiicientl. to

. cause the basic constituents of the "said lag j tocombine with the ashl of the coal.

3. A processoiprodueing. alspe'cula r .1ron

from a slag ontaining manganese. and phos-- phorus, which consistsfina'mixing thefslag with coal; andsubjectin'g theicoal tooxidation, the temperature being suliiciently high to cause the basic constituents-of:thefslag to combine WitlQthe silicates o f'the ash Oftll coal;

rich in phosphorus frem" a-sleg containing. phosphorus, which consists in causing the basic constituents of -the slag to combine 4. A method, ofprodubing 'an an alloy with silicates under the action of heat, the

temperature being sulficiently high to cause the resmelting ofthe said silicates.

65 Y What I claim as my invention anddesirei,

5. A method of roducing a specular iron In testimony, that I claim the foregoing from a slug containing niurnganese and ph0sas my invention, I have s gned my name in phorus which consists in causing the basic presence of two subscribing witnesses.

constituents cf the said slag to combine with FRIEDRICH VON HOLT. 5 silicates under the influence of heat, the tein- W'itnesses:

peratui'e being sufficiently high to cause the FREDERICK HOYERMANN,

re-smelting of the said silicates. Gnoncn Lnsimim. 

